i recommend you using Moyea video converter which is a powerful and reliable . Support to convert almost all video, audio and images files like TiVo, FLV, F4V, TOD, H.264/AVC, MPEG, MPEG-2, MPEG-4, AVI, WMV, MKV, MOV, MTS, M2TS, MOD, AAC, AC3, JPG etc. With it, you can convert all videos, audios to your portable devices like iPad, iPod, iPhone, Nexus one, iRiver Smart HD, Droid, Palm Pre, PSP, PS3, Xbox, Zune, Creative Zen, cell phones, Archos, Sansa, etc for playing. You can merge files to only one, convert videos in batch, trim video length, crop unwanted area in the frame, add watermark for logo, adjust effect, removing image noise and interlace, replace the original files' audio, flip original video vertically or horizontally. You can also enjoy the perfect audio and video synchronization and super fast conversion speed.
In addition, you are allowed to convert HD, AVCHD videos like M2TS, MTS, M2T, TOD, MOD, TP, EVO, etc from digital camcorders JVC, Canon, Panasonic, Sony, etc to Windows Movie Maker, Sony Vegas, Adobe Premiere, etc for further editing; or insert to PPT for presentation; or even upload to YouTube for sharing.
video files (mpg file extension, MPEG file format). It is the same video file format. You can use booth file extensions.
MPEG-4
Try MPEG Video Wizard DVD to convert video files to .avi extension or convert .avi video file to other formats, such as mpeg 2, mp4, etc. I like UM video converter
No. MP3 is audio only. MPEG is the video version (MP3 stands for MPEG-1 Audio Layer 3, and is the audio part of MPEG video files)
You can use converters to do this job, such as Aimersoft video converter, fully support convert MPEG files into AVI format. Know more from here: http://www.aimersoft.com/video-converter.html#161 And some video editing software own the converting functionality as well. I would like to recommend you AviDemux or mpeg video wizard.
The most common video format (in my opinion) that is used in Windows Movie Maker is either .avi or .mpeg.
all above
I used Mpeg 4 I think you should use that for a PSP.
Video Convertr to convert avi mpeg
There are multiple types of files used to store video, a few of them include: -MPEG -M4V -AVI -WMV
iMovie just supports such popular video formats as DV, HDV, MPEG-4, MPEG-2, MOV, and AVCHD.1. So if you have some video files can't import to imovie, you need use Video Converter for Mac to convert them to .mp4 format that imovie supports.
First you download the Any Video Converter (no viruses) and than change the video format to MPEG 4, a 100 megabyte video takes about 21 minutes. The PSP does NOT support any other files that i know of. PSP Video 9 is a free PSP video converter that converts video files, YouTube videos, movies and DVD's so you can play them on your PSP. The software can convert all types of video files (avi, divx, xvid, flv, x264, mkv, vob, mpeg, DVD's, YouTube, etc.) into the proper video formats (MPEG-4, H.264) that play on the PSP. See links to download